Hertel C.E03.1072 Aircraft Extension Drill Bit 27/64 in

Product Description

The HERTEL C.E03.1072 is an aircraft extension drill bit engineered for deep-reach drilling applications in metal, composite, and structural materials. It measures 27/64 inch (0.4219 inch decimal) in diameter with an overall length of 6 inches, giving technicians the extended reach needed to access confined or deep cavities. The 135-degree split point promotes self-centering on contact, reducing the need for a center punch and minimizing walking on hard surfaces. Manufactured from high-speed steel with an oxide finish, this bit resists heat buildup during prolonged cutting cycles. Right-hand spiral flutes clear chips efficiently, making it a reliable choice for production and maintenance drilling tasks.

This bit is designed for use in aerospace maintenance, sheet metal fabrication, HVAC equipment assembly, and general mechanical trade work where standard-length bits cannot reach the work surface. The 3-15/16 inch flute length (3.9375 inches decimal) provides ample cutting depth, and the straight cylindrical shank seats securely in standard drill chucks. General-purpose tool performance rating makes it appropriate for a wide range of ferrous and non-ferrous materials. Technicians in aviation, mechanical, and industrial maintenance trades will find this bit useful for drilling through structural members, brackets, and assemblies with restricted access.

Key Features

• 135-degree split point with web thinning for self-centering entry and reduced thrust force
• 6-inch overall length provides extended reach into deep or confined work areas
• High-speed steel construction handles heat generated in metal drilling applications
• Oxide finish adds a layer of corrosion and heat resistance to the cutting surfaces
• Two right-hand spiral flutes with tapered web configuration for efficient chip evacuation
• Straight cylindrical shank compatible with standard drill chucks and quick-change holders

Compatibility

Designed as a general-purpose aircraft extension drill bit suitable for use with standard drill chucks accepting a 27/64 inch straight cylindrical shank. No specific model or system compatibility was stated in the product data.

Installation Notes

This drill bit is installed and used by machinists, aviation maintenance technicians, and mechanical trade professionals. Before use, confirm the drill chuck is fully tightened and the workpiece is secured to prevent movement. Apply cutting fluid when drilling ferrous metals to extend bit life and manage heat. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.